I was looking at the How To Become An Undead section of Sorcerer & Sword. So the way I understand it is that you effectively become a demon. But when you run the math presented there, you don't end up with numbers in accordance with the normal demon creation rules.

The really big question is: Can the Sorcerer who becomes a Lich still do Sorcery? The core book is pretty clear that demons can't. Is Lichdom an exception?

If it's not an exception I'm not sure what Lichdom buys you other than not-dying. Is the Lich supposed to get Abilities in accordance with it's Lore score? Or perhaps via the Token used to keep it alive?

One other subtle point. Demons don't become unbound when their masters die. Does that carry over into Lichdom? I may not be able to do new sorcery but any demons I had bound to me upon my "death" are still bound to me?

For what it's worth, the reason I was originally asking these questions is because I had a Lich in the game I just played. She was one of the PC's great-grand mother. I treated her as an Imminent as per Sorcerer & Sword, so no Summoning or Banishing.

However, the PC handled it was that she went and gathered her friends and family together (some of whom are also Sorcerers). Together they crafted a coffin, dug a grave, carved a headstone, and gathered a bouquet of flowers and the PC used all of this as a Contain. It was packing about 13 dice. This all culminated in a struggle on the edge of the grave and in the end the Lich was knocked into it and sealed up nice and tight.